Spin effects in two quark system and mixed states

Abstract

Based on th numeric solution of a system of coupled channels for vector mesons (S- and D-waves mixing) and for tensor mesons (P- and F-waves mixing) mass spectrum and wave function of a family of vector mesons in triplet states are obtained. The calculations are performed using well-known Cornell potential with a mixed Lorentz-structure of the confinement term. The spin-dependent part of the potential is taken from the Breit-Fermi approach. The effect of irregular terms of potential is considered within the framework of the perturbation theory and/or of the configuration interaction approach, modify for a system of coupled equations. It is shown that even a small integral contribution of the D-wave to the total wave function of quark-quark system is very important for the calculation of certain characteristics of the meson states.